3. broken or cut strands;
4. number, distribution and type of visible
broken wires. When such damage is
discovered, the rope shall either be
removed from service or given as
inspection.
B. Care shall be taken when inspecting sections of
rapid deterioration such as flange points, crossover
points, and repetitive pickup points on drums.
58 Periodic inspection
A. The inspection frequency shall be determined by a
qualified person and shall be based on such factors
as:
1. expected rope life as determined by
experience on the particular installation or
similar installations
2. severity of environment
3. percentage of capacity lifts
4. frequency rates of operation
5. exposure to shock loads
Inspection need not be at equal calendar
intervals and should be more frequent as the
rope approaches the end of it's service life.
This inspection shall be made at least
annually.
B. Periodic inspection shall be performed by a desig-
nated person. This inspection shall cover the entire
length of the rope. Only the surface wires need be
inspected. No attempt should be made to open the
rope. Any deterioration results in appreciable loss of
original strength, such as described below, shall be
noted and determination made as to whether use of
the rope would constitute a hazard: points listed
above reduction of rope diameter below nominal
diameter due to loss of core support, internal or
external corrosion, or wear of outside wires;
severely corroded, cracked, bent, worn or improp-
erly applied connections;
C. Care shall be taken when inspecting sections subject
to rapid deterioration such as the following:
1. sections in contact with saddles, equalizer
sheaves, or other sheaves where rope travel
is limited
2. sections of the rope at or near terminal ends
where corroded or broken wires may
protrude
ROPE REPLACEMENT
59 No precise rules can be given for determination of the
exact time for replacement of rope, since many
variable factors are involved.
Continued use in this respect depends upon
good judgement by a designated person in
evaluating remaining strength in a used rope
after allowance for deterioration disclosed by
inspection. Continued rope operation depends
upon this remaining strength.
60 Conditions such as the following shall be reason for
questioning continued use of the rope or increasing
the frequency of inspection:
A. in running ropes, six randomly distributed broken
wires in one lay or three broken wires in one strand
in one lay
B. one outer wire broken at the contact point with the
core of the rope structure and protrudes or loops out
of the rope structure. Additional inspection of this
section is required
C. wear of one third of the original diameter of the
outside individual wire
D. kinking, crushing, birdcaging, or any other damage
resulting in distortion of the rope structure
E. evidence of any heat damage from any cause
F. reduction from nominal diameter of more than 1/64
in. (0.4mm) for diameters up to and including 5/16
in. (8 mm), 1/32 in. (0.8 mm) for diameter 3/8 in.
(9.5 mm) to and including 1/2 in. (13 mm), 3/64 in.
(1.2 mm) for diameter 9/16 in. (14.5 mm) to and
including 3/4 in. (19 mm). 1/16 in. (1.6 mm) for
diameter 7/8 in. (22 mm) to and including 11/8 in.
(29 mm), 3/32 in. (2.4 mm) for diameters 11/4 in.
(32 mm) to and including 11/2 in. (38 mm)
INSPECTION, TESTING AND MAINTENANCE
GENERAL
INSP 9/98
1-5.3.0
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